CN217206727U

CN217206727U - Double-fed wind power generation system and double-fed wind power generation equipment

Info

Publication number: CN217206727U
Application number: CN202221113015.5U
Authority: CN
Inventors: 哈拉比法瑞斯; 武胜飞
Original assignee: Sany Renewable Energy Co Ltd
Current assignee: Sany Renewable Energy Co Ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-08-16
Anticipated expiration: 2032-05-10

Abstract

The utility model belongs to the technical field of wind power generation, concretely relates to double-fed wind power generation system and double-fed wind power generation equipment. The doubly-fed wind power generation system comprises: a main generator assembly; the wind wheel driving assembly is in transmission connection with the main generator assembly; the auxiliary generator is in transmission connection with the wind wheel driving assembly through an auxiliary transmission mechanism; and the control device is electrically connected with the main generator assembly and the auxiliary generator. Through the technical scheme of the utility model, can be before main generator subassembly and outside electric wire netting are incorporated into the power networks, provide the electric energy through auxiliary generator, can make main generator subassembly normally start to make electrical consumption spare and affiliated power consumption system normally work, need not additionally to consume the energy, and only need on current double-fed wind generating set's basis reequip can, the structure is simple relatively, maneuverability is strong, easily realizes.

Description

Double-fed wind power generation system and double-fed wind power generation equipment

Technical Field

The utility model belongs to the technical field of wind power generation, concretely relates to double-fed wind power generation system and double-fed wind power generation equipment.

Background

The double-fed generator set is one of generator sets commonly used in the field of wind power generation, because the double-fed generator set adopts an alternating current excitation technology to provide excitation current required by starting, power cannot be supplied before the double-fed generator set is connected with an external power grid, and wind power generation equipment is difficult to realize the grid connection in a short time after the assembly is completed, the double-fed generator set cannot be started at the stage, power cannot be supplied to power consumption devices of the generator set and auxiliary power systems, and normal work and maintenance operations (such as pitch changing, yaw, heating, dehumidification, deicing and the like) are affected.

The existing double-fed generator set usually adopts a storage battery as an energy storage device or an external diesel generator as a standby power supply of the double-fed generator set. However, in the above scheme, the storage battery needs to be charged by the operation of the double-fed generator set, and the method is generally suitable for the situation that the double-fed generator set cannot generate power temporarily under special conditions after grid connection, and the double-fed generator set belongs to a large-capacity generator set and needs to be configured with a relatively complex circuit and a charging and discharging control unit for charging the storage battery; external diesel generator needs to consume extra energy, and wind power generation equipment belongs to large-scale equipment, and the energy supply operation degree of difficulty is great. Therefore, the scheme is applied before the doubly-fed generator set is connected to the grid, the operability is low, and the cost is high.

SUMMERY OF THE UTILITY MODEL

In view of this, in order to improve at least one of the above-mentioned problems existing in the prior art, the present invention provides a doubly-fed wind power generation system and a doubly-fed wind power generation apparatus.

The utility model provides a double-fed wind power generation system, include: a main generator assembly; the wind wheel driving assembly is in transmission connection with the main generator assembly; the auxiliary generator is in transmission connection with the wind wheel driving assembly through an auxiliary transmission mechanism; and the control device is electrically connected with the main generator assembly and the auxiliary generator.

The utility model discloses beneficial effect among the above-mentioned technical scheme embodies:

the traditional double-fed wind generating set is optimized and improved, an auxiliary generator is connected into a wind wheel driving assembly of a main generator assembly, so that the main generator assembly can be normally started and some power consumption devices of the main generator assembly can normally work by generating power through the auxiliary generator and supplying power to the main generator assembly before the main generator assembly is connected to the grid; meanwhile, the wind energy can be effectively utilized for driving, extra energy consumption is not needed, and the auxiliary generator can be a small-capacity generator, so that the cost is favorably controlled.

Furthermore, the utility model provides a double-fed wind power generation system, on current double-fed wind power generation set carry on simply repack can, maneuverability is stronger, easily realizes.

In a feasible implementation mode, the wind wheel driving assembly comprises a wind wheel mechanism and a main transmission mechanism, wherein the input end of the main transmission mechanism is in transmission connection with the wind wheel mechanism, and the output end of the main transmission mechanism is in transmission connection with the main generator assembly; the input end of the auxiliary transmission mechanism is in transmission connection with the main transmission mechanism, and the output end of the auxiliary transmission mechanism is in transmission connection with the auxiliary generator.

In one possible implementation, the main transmission comprises: a transmission; one end of the first transmission shaft is in transmission connection with the wind wheel mechanism, and the other end of the first transmission shaft is in transmission connection with the input end of the speed changer; one end of the second transmission shaft is in transmission connection with the output end of the speed changer, and the other end of the second transmission shaft is in transmission connection with the main generator assembly; wherein, the auxiliary transmission mechanism is in transmission connection with the first transmission shaft or the second transmission shaft.

In one possible implementation, the auxiliary transmission comprises: the belt wheel mechanism comprises a first belt wheel, a second belt wheel and a transmission belt, wherein the first belt wheel, the second belt wheel and the transmission belt are in transmission connection, the first belt wheel is sleeved on a first transmission shaft or a second transmission shaft, the second belt wheel is sleeved on an input shaft of the auxiliary generator, and the transmission belt is wound on the first belt wheel and the second belt wheel and is in friction transmission with the first belt wheel and the second belt wheel.

In one possible implementation, the auxiliary transmission comprises: the chain wheel mechanism comprises a first chain wheel, a second chain wheel and a transmission chain, wherein the first chain wheel, the second chain wheel and the transmission chain are in transmission connection, the first chain wheel is sleeved on a first transmission shaft or a second transmission shaft, the second chain wheel is sleeved on an input shaft of the auxiliary generator, and the transmission chain is wound on the first chain wheel and the second chain wheel and is meshed with the first chain wheel and the second chain wheel.

In one possible implementation, the auxiliary transmission comprises: the gear mechanism comprises a plurality of transmission gears which are meshed in sequence, and the plurality of transmission gears comprise input gears and output gears; the input gear is sleeved on the first transmission shaft or the second transmission shaft, and the output gear is sleeved on the input shaft of the auxiliary generator.

In one possible implementation, the doubly-fed wind power generation system further comprises: and the clutch device is arranged at the joint of the main transmission mechanism and the auxiliary transmission mechanism, and the auxiliary transmission mechanism can be connected or disconnected with the main transmission mechanism through the clutch device.

In a feasible implementation manner, the double-fed wind power generation system further comprises an auxiliary power system, the auxiliary power system is electrically connected with the control device, and the auxiliary generator supplies power to the auxiliary power system through the control device; wherein, the auxiliary power system comprises a pitch system, a yaw system and a heating system.

In one possible implementation, the auxiliary generator is a permanent magnet generator; and/or the main generator assembly comprises: the main generator is a double-fed generator, and the input end of the main generator is in transmission connection with the wind wheel driving component; the transformer is electrically connected with the main generator and the control device; and the converter is connected with the transformer in parallel.

The utility model also provides a double-fed wind power generation equipment, include: a doubly fed wind power generation system as claimed in any one of the preceding claims.

Drawings

Fig. 1 is a schematic view of a doubly-fed wind power generation system according to an embodiment of the present invention.

Fig. 2 is a schematic view of a doubly-fed wind power generation system according to an embodiment of the present invention.

Fig. 3 is a schematic view of a doubly-fed wind power generation system according to an embodiment of the present invention.

Fig. 4 is a schematic view of a pulley mechanism of a doubly-fed wind power generation system according to an embodiment of the present invention.

Fig. 5 is a schematic view illustrating a sprocket mechanism of a doubly-fed wind power generation system according to an embodiment of the present invention.

Fig. 6 is a schematic view of a gear mechanism of a doubly-fed wind power generation system according to an embodiment of the present invention.

Fig. 7 is a schematic view of a doubly-fed wind power generation system according to an embodiment of the present invention.

Fig. 8 is a schematic view of a doubly-fed wind power generation system according to an embodiment of the present invention.

Fig. 9 is a schematic view of a doubly-fed wind power generation system according to an embodiment of the present invention.

Fig. 10 is a schematic block diagram of a doubly-fed wind power generation apparatus according to an embodiment of the present invention.

Detailed Description

In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indicators in the embodiments of the present application (such as up, down, left, right, front, back, top, bottom … …) are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The following provides some embodiments of the double-fed wind power generation system and the double-fed wind power generation equipment in the technical scheme of the utility model.

In an embodiment of the first aspect of the present invention a doubly-fed wind power generation system 1 is provided.

As shown in fig. 1, the doubly-fed wind power generation system 1 comprises a main generator assembly 11, a rotor drive assembly 12, an auxiliary generator 13, an auxiliary transmission 14 and a control device 15. The wind wheel driving assembly 12 is in transmission connection with the main generator assembly 11, and the main generator assembly 11 can be connected with an external power grid 3 in a grid-connection mode; when the main generator assembly 11 is connected to the external power grid 3, the main generator assembly 11 can be driven by the wind wheel driving assembly 12 to operate and generate power, and supply power to the external power grid 3. The auxiliary generator 13 is in transmission connection with the wind wheel driving assembly 12 through an auxiliary transmission mechanism 14, and the wind wheel driving assembly 12 can provide power for the auxiliary generator 13 through the auxiliary transmission mechanism 14 to drive the auxiliary generator 13 to work; the control device 15 is electrically connected to the main generator assembly 11 and the auxiliary generator 13, respectively, and the auxiliary generator 13 can supply power to the control device 15 and can supply power to the main generator assembly 11 through the control device 15.

It can be understood that after the large-scale wind power generation equipment is assembled, the large-scale wind power generation equipment cannot be immediately connected with an external power grid in a short time, and a doubly-fed generator commonly used in a main generator assembly at present can provide exciting current required during starting after being connected with the power grid, so that the double-fed generator cannot be normally started before being connected with the power grid, and cannot supply power to the outside. In the prior art, a storage battery is adopted as an energy storage device, the storage battery cannot be charged at this stage, a complex charge and discharge control circuit needs to be configured, and the operability is low; the scheme of adopting the diesel generator needs additional energy consumption, and the operations of fuel transportation, supplement and the like consume time and labor, so that the diesel generator is not beneficial to being applied to large-scale wind power generation equipment.

In the doubly-fed wind power generation system 1 in this embodiment, the wind power of the wind wheel driving component 12 is used to drive the auxiliary generator 13 to generate power, so that before the main generator component 11 is connected to the external power grid 3, the auxiliary generator 13 supplies power to the main generator component 11, so that the main generator component 11 can be started normally, and electric energy is provided for the electrical consumption device of the main generator component 11, so that the electrical consumption device can work normally. The double-fed wind power generation system 1 in the embodiment does not need to consume extra energy, can be modified on the basis of the existing double-fed wind power generation set, and is relatively simple in structure, strong in operability and easy to realize.

It should be noted that the control device 15 in this embodiment includes, but is not limited to, an integrated controller, such as an electric control cabinet, and may be another type of controller.

In some embodiments of the present invention, as shown in fig. 1, the wind wheel driving assembly 12 of the doubly-fed wind power generation system 1 comprises a wind wheel mechanism 121 and a main transmission mechanism 122. The wind wheel mechanism 121 can rotate under the action of wind power; the wind wheel mechanism 121 is in transmission connection with an input end of the main transmission mechanism 122, and an output end of the main transmission mechanism 122 is in transmission connection with the main generator assembly 11. When the main generator assembly 11 is in a grid connection state with the external power grid 3, the wind turbine mechanism 121 can drive the main generator assembly 11 to work and generate electricity. The input end of the auxiliary transmission mechanism 14 is connected to the main transmission mechanism 122, so that the main transmission mechanism 122 and the auxiliary transmission mechanism 14 form transmission connection, when the wind wheel mechanism 121 works, the main transmission mechanism 122 and the auxiliary transmission mechanism 14 drive the auxiliary generator 13 to work, the power of the wind wheel driving assembly 12 is fully utilized, external power is not needed, extra energy consumption is not needed, energy conservation and emission reduction are facilitated, and the workload of manual maintenance operation can be reduced.

In some embodiments of the present invention, as shown in fig. 2 and 3, the main transmission mechanism 122 of the doubly-fed wind power generation system 1 includes a transmission 1221, a first transmission shaft 1222 and a second transmission shaft 1223. One end of the first transmission shaft 1222 is in transmission connection with the wind wheel mechanism 121, and the other end is in transmission connection with the input end of the transmission 1221; one end of the secondary transmission shaft 1223 is in transmission connection with the output end of the transmission 1221, and the other end is in transmission connection with the main generator assembly 11. The wind turbine mechanism 121 can output power to the main generator unit 11 sequentially via the first transmission shaft 1222, the transmission 1221, and the second transmission shaft 1223. Wherein the first transmission shaft 1222 is a low speed shaft; transmission 1221 is used to increase the rotational speed of second drive shaft 1223 such that second drive shaft 1223 forms a high-speed shaft. The auxiliary transmission 14 may be in driving connection with the first transmission shaft 1222 (as in the state shown in fig. 2) or in driving connection with the second transmission shaft 1223 (as in the state shown in fig. 3), and a corresponding transmission ratio may be set to be adapted to the auxiliary generator 13.

Further, in one particular implementation, as shown in fig. 2 and 4, the auxiliary transmission 14 includes a pulley mechanism 141. The pulley mechanism 141 specifically includes a first pulley 1411, a second pulley 1412, and a transmission belt 1413; the transmission belt 1413 is wound around the first pulley 1411 and the second pulley 1412 to form a friction transmission form. The first pulley 1411 is sleeved on the first transmission shaft 1222, the second pulley 1412 is sleeved on an input shaft of the auxiliary generator 13, and the first transmission shaft 1222 transmits power to the auxiliary generator 13 through the first pulley 1411, the transmission belt 1413 and the second pulley 1412 to drive the auxiliary generator 13 to work. Of course, the first pulley 1411 may be sleeved on the second transmission shaft 1223 (in the state shown in fig. 3), and the second transmission shaft 1223 outputs power to the auxiliary generator 13 through the pulley mechanism 141. Wherein, according to the different connection position of the first belt wheel 1411, the corresponding belt wheel transmission ratio can be set to be matched with the auxiliary generator 13.

In another embodiment, as shown in fig. 2 and 5, the auxiliary transmission 14 may also employ a sprocket mechanism 142. The sprocket mechanism 142 includes a first sprocket 1421, a second sprocket 1422, and a drive chain 1423; the drive chain 1423 is trained over and engaged with the first and

second sprockets

1421, 1422 to form a chain drive. The first chain wheel 1421 is sleeved on the first transmission shaft 1222, the second chain wheel 1422 is sleeved on the input shaft of the auxiliary generator 13, and the first transmission shaft 1222 transmits power to the auxiliary generator 13 through the first chain wheel 1421, the transmission chain 1423 and the second chain wheel 1422 to drive the auxiliary generator 13 to work. Of course, the first chain wheel 1421 may also be sleeved on the second transmission shaft 1223 (as shown in fig. 3), and the second transmission shaft 1223 outputs power to the auxiliary generator 13 through the chain wheel mechanism 142. Wherein, according to the different connection position of the first chain wheel 1421, a corresponding chain wheel transmission ratio can be set to match with the auxiliary generator 13.

In yet another specific implementation, as shown in fig. 2 and 6, the auxiliary transmission 14 may also employ a gear mechanism 143. The gear mechanism 143 includes a plurality of sequentially meshed transmission gears, such as the example in fig. 6, the transmission gears specifically include an input gear 1431 and an output gear 1432 that are meshed with each other, wherein the output gear 1432 is sleeved on the first transmission shaft 1222, the output gear 1432 is sleeved on an input shaft of the auxiliary generator 13, and the first transmission shaft 1222 transmits power to the auxiliary generator 13 through the output gear 1432 and the output gear 1432 to drive the auxiliary generator 13 to operate. Of course, the input gear 1431 may be sleeved on the second transmission shaft 1223 (in the state shown in fig. 3), and the power is transmitted from the second transmission shaft 1223 to the auxiliary generator 13 through the input gear 1431 and the output gear 1432. Wherein, according to the connection position of the input gear 1431, a corresponding gear ratio can be set to be adapted to the auxiliary generator 13.

It should be noted that the gear mechanism 143 is not limited to the example shown in fig. 6, and the number of the transmission gears may also be other numbers than two, that is, another transmission gear is further disposed between the input gear 1431 and the output gear 1432, and a plurality of transmission gears are sequentially engaged to form a gear transmission form, which may be set according to specific situations.

Furthermore, as shown in fig. 7, in the doubly-fed wind power generation system 1 in any of the above embodiments, a clutch device 145 is further provided at a connection position of the main transmission mechanism 122 and the auxiliary transmission mechanism 14, and the clutch device 145 is used for adjusting a connection relationship between the main transmission mechanism 122 and the auxiliary transmission mechanism 14, so that the main transmission mechanism 122 and the auxiliary transmission mechanism 14 can be in transmission connection or disconnection through the clutch device 145 according to different specific use requirements. The clutch device 145 includes, but is not limited to, a clutch.

For example, before the main generator assembly 11 is connected to the external power grid 3, the main transmission mechanism 122 and the auxiliary transmission mechanism 14 may be in transmission connection through the clutch device 145 to drive the auxiliary generator 13 to operate; when the main generator assembly 11 is connected to the external power grid 3, the main generator assembly 11 can normally provide power, and at this time, the clutch device 145 can disconnect the connection between the main transmission mechanism 122 and the auxiliary transmission mechanism 14, which is beneficial to improving the power generation efficiency of the main generator assembly 11.

In some embodiments of the present invention, as shown in fig. 8, the doubly-fed wind power generation system 1 further comprises an auxiliary power system 16 for performing corresponding auxiliary operations on the wind turbine driving assembly 12 and the main generator assembly 11. The control device 15 is electrically connected to the auxiliary power system 16 such that the auxiliary generator 13 is able to supply power to the auxiliary power system 16 via the control device 15 to enable the auxiliary power system 16 to operate normally before the main generator assembly 11 is connected to the external power grid 3.

Specifically, the auxiliary power system 16 includes a pitch system 161, a yaw system 162, and a heating system 163, each of which includes a corresponding actuator capable of performing a corresponding operation according to a control command of the control device 15. The heating system 163 may further include a heating and dehumidifying system and/or a heating and deicing system, among others. Of course, the auxiliary power system 16 may also include other power systems according to different actual usage requirements, and will not be described herein again.

Before the main generator assembly 11 is connected with the external power grid 3, the auxiliary generator 13 supplies power to the auxiliary power system 16, and then the auxiliary power system 16 performs maintenance operations such as corresponding pitch control, yaw control, heating deicing, dehumidification and the like on the wind wheel driving assembly 12 and the main generator assembly 11, so that the reduction of equipment failure rate, the improvement of equipment safety and the prolongation of equipment service life are facilitated.

In some embodiments of the present invention, as shown in fig. 9, the main generator assembly 11 of the doubly-fed wind power generation system 1 comprises a main generator 111, a transformer 112 and a converter 113. The main generator 111 is a doubly-fed generator, and the input end of the main generator 111 is in transmission connection with the wind wheel driving assembly 12, and can work under the driving of the wind wheel driving assembly 12. The transformer 112 is electrically connected with the main generator 111 to perform a corresponding transformation operation; a converter 113 is arranged in parallel with the transformer 112 for a corresponding conversion operation. The control device 15 is electrically connected to the transformer 112 to perform a voltage transformation operation on the electric power input to the main generator assembly 11 by the auxiliary generator 13 before the main generator 111 is connected to the external grid 3; after the main generator 111 is grid-connected to the external grid 3, the transformer 112 transforms the electric power input from the main generator 111 to the external grid 3 to be adapted to the voltage of the external grid 3.

Further, in any of the above embodiments, the auxiliary generator 13 may specifically be a permanent magnet generator, and permanent magnets of the permanent magnet generator are used instead of current excitation, so as to directly use the power of the wind wheel driving assembly 12 to drive the permanent magnet generator to generate power before the main generator assembly 11 is connected to the external power grid 3, so as to provide electric power for the main generator assembly 11 and/or the auxiliary power system 16. Compared with the scheme that the storage battery or the diesel generator is adopted to provide standby electric energy in the existing double-fed wind generating set, the scheme that the permanent magnet generator is adopted is relatively simple, complex circuits and control systems are not needed, the operability is higher, and extra energy consumption is not needed.

In addition, the permanent magnet generator also has the advantages of small volume, low loss, high efficiency and the like, and is beneficial to reducing the cost.

The following is a specific embodiment of the doubly-fed wind power generation system 1 of the present invention:

as shown in fig. 9, the doubly-fed wind power generation system 1 includes a main generator assembly 11, a rotor driving assembly 12, an auxiliary generator 13, an auxiliary transmission mechanism 14, a control device 15, and an auxiliary power system 16.

The main generator assembly 11 comprises in particular a main generator 111, a transformer 112 and a converter 113. The main generator 111 is a doubly fed generator. The transformer 112 is electrically connected to the main generator 111, and the converter 113 is provided in parallel with the transformer 112. The wind wheel driving assembly 12 comprises a wind wheel mechanism 121 and a main transmission mechanism 122, wherein the main transmission mechanism 122 specifically comprises a first transmission shaft 1222, a transmission 1221 and a second transmission shaft 1223; one end of the first transmission shaft 1222 is in transmission connection with the wind wheel mechanism 121, and the other end is in transmission connection with the input end of the transmission 1221; one end of the second transmission shaft 1223 is drivingly connected to the output of the transmission 1221, and the other end is drivingly connected to the input of the main generator 111. The wind wheel mechanism 121 can rotate by wind power, and can transmit power to the main generator 111 through the first transmission shaft 1222, the transmission 1221 and the second transmission shaft 1223 to drive the main generator 111 to operate. Wherein the first transmission shaft 1222 is a low speed shaft; transmission 1221 is used to increase the rotational speed of second drive shaft 1223 such that second drive shaft 1223 forms a high-speed shaft. The main generator 111 can be electrically connected to the external grid 3, and a grid-connection switch 31 is provided in a circuit between the transformer 112 and the external grid 3 to control an on-off state of the circuit between the main generator 111 and the external grid 3.

The auxiliary generator 13 is embodied as a permanent magnet generator, and the control device 15 is electrically connected to the auxiliary generator 13 and the transformer 112. The main gear mechanism 122 can be brought into driving connection with the auxiliary generator 13 via the auxiliary gear mechanism 14. Specifically, a clutch 145 is disposed at a connection between the auxiliary transmission mechanism 14 and the main transmission mechanism 122, the clutch 145 is respectively connected to the main transmission mechanism 122 and the auxiliary transmission mechanism 14, and the clutch can adjust a connection state between the main transmission mechanism 122 and the auxiliary transmission mechanism 14, such as forming a transmission connection between the main transmission mechanism 122 and the auxiliary transmission mechanism 14, or disconnecting the main transmission mechanism 122 from the auxiliary transmission mechanism 14. The auxiliary transmission mechanism 14 may be in transmission connection with the first transmission shaft 1222 of the main transmission mechanism 122 (in the state shown in fig. 2), or in transmission connection with the second transmission shaft 1223 of the main transmission mechanism 122 (in the state shown in fig. 3), and a corresponding transmission ratio may be set according to different specific connection positions to adapt to the auxiliary generator 13. The following description will be given taking an example in which the auxiliary transmission mechanism 14 is connected to the first transmission shaft 1222.

The auxiliary gear 14 is embodied in a number of different implementations. In one particular implementation, as shown in fig. 4 and 9, the auxiliary transmission 14 includes a pulley mechanism 141. The pulley mechanism 141 specifically includes a first pulley 1411, a second pulley 1412, and a transmission belt 1413; the transmission belt 1413 is wound around the first pulley 1411 and the second pulley 1412 to form a friction transmission form. The first pulley 1411 is sleeved on the first transmission shaft 1222, the second pulley 1412 is sleeved on an input shaft of the auxiliary generator 13, and the first transmission shaft 1222 transmits power to the auxiliary generator 13 through the first pulley 1411, the transmission belt 1413 and the second pulley 1412 to drive the auxiliary generator 13 to work.

In another specific implementation, as shown in fig. 5 and 9, the auxiliary transmission 14 includes a sprocket gear 142. The sprocket mechanism 142 includes a first sprocket 1421, a second sprocket 1422, and a drive chain 1423; the driving chain 1423 is wound around the first and

second sprockets

1421 and 1422, and meshes with the first and

second sprockets

1421 and 1422 to form a chain transmission type. The first chain wheel 1421 is sleeved on the first transmission shaft 1222, the second chain wheel 1422 is sleeved on the input shaft of the auxiliary generator 13, and the first transmission shaft 1222 transmits power to the auxiliary generator 13 through the first chain wheel 1421, the transmission chain 1423 and the second chain wheel 1422 to drive the auxiliary generator 13 to work.

In yet another specific implementation, as shown in fig. 6 and 9, the auxiliary transmission 14 includes a gear mechanism 143. The gear mechanism 143 includes a plurality of sequentially meshed transmission gears, such as the example in fig. 6, the transmission gears specifically include an input gear 1431 and an output gear 1432 that are meshed with each other, wherein the output gear 1432 is sleeved on the first transmission shaft 1222, the output gear 1432 is sleeved on an input shaft of the auxiliary generator 13, and the first transmission shaft 1222 transmits power to the auxiliary generator 13 through the output gear 1432 and the output gear 1432 to drive the auxiliary generator 13 to operate.

The auxiliary generator 13 can supply power to the control device 15 when working; the control device 15 is electrically connected to the auxiliary electrical system 16 so that the auxiliary generator 13 can be electrically connected to the auxiliary electrical system 16 through the control device 15 and supply power to the auxiliary electrical system 16. The auxiliary power system 16 specifically includes a pitch system 161, a yaw system 162, and a heating system 163, each of which includes a corresponding actuator capable of performing a corresponding operation according to a control command of the control device 15. The heating system 163 may further include a heating and dehumidifying system and/or a heating and deicing system, among others. In addition, the auxiliary power system 16 may also include other power systems according to actual usage requirements.

Before the main generator 111 is connected to the external power grid 3, the main generator 111 cannot provide an excitation current, and at this time, the wind wheel mechanism 121 transmits power to the auxiliary generator 13 through the main transmission mechanism 122 and the auxiliary transmission mechanism 14 to drive the auxiliary generator 13 to work; the auxiliary generator 13 supplies power to the control device 15, and supplies power to the main generator assembly 11 and the auxiliary power system 16 through the control device 15, so that the own power consumption device of the main generator assembly 11 and the auxiliary power system 16 can work normally to perform corresponding operations (such as pitching, yawing, heating, dehumidifying, deicing and the like).

When the main generator 111 is connected to the external grid 3, the wind turbine 121 can drive the main generator 111 to work and generate power, and at this time, the main generator 111 can provide exciting current and provide electric energy to the external grid 3 and electric devices in the doubly-fed wind power generation system 1, and at this time, the connection between the main transmission mechanism 122 and the auxiliary transmission mechanism 14 can be disconnected through the clutch device 145, which is beneficial to improving the power generation efficiency of the main generator 111.

During the power transmission between the main generator 111 and the auxiliary generator 13 or the external grid 3, the transformer 112 and the converter 113 are capable of performing respective transformation and transformation operations. The auxiliary generator 13 is a permanent magnet generator, and the permanent magnet of the permanent magnet generator is used to replace current excitation, so that the permanent magnet generator can be directly driven by the power of the wind wheel driving assembly 12 to generate power before the main generator assembly 11 is connected to the external power grid 3. In addition, the permanent magnet generator also has the advantages of small volume, low loss, high efficiency and the like, and is beneficial to reducing the cost.

In the doubly-fed wind power generation system 1 in this embodiment, the wind power of the wind wheel driving assembly 12 is used to drive the auxiliary generator 13 to generate power, so that before the main generator assembly 11 is connected to the external power grid 3, the auxiliary generator 13 provides electric energy, so that the main generator assembly 11 can be started normally, and the electrical consumers of the main generator assembly 11 and the auxiliary power system 16 can work normally. The double-fed wind power generation system 1 in the embodiment does not need to consume extra energy, can be modified on the basis of the existing double-fed wind power generation set, and is relatively simple in structure, strong in operability and easy to realize.

In an embodiment of the second aspect of the present invention, there is also provided a doubly-fed wind power generation apparatus 2, as shown in fig. 1 and 10, the doubly-fed wind power generation apparatus 2 includes the doubly-fed wind power generation system 1 in any of the above embodiments, and can provide electric energy through the auxiliary generator 13 before the main generator assembly 11 is connected to the external grid 3.

Further, in practical applications, the doubly-fed wind power generation apparatus 2 may further include a tower, a nacelle, and the like, where the doubly-fed wind power generation system 1 is disposed on the tower, and one part of the devices is disposed outside the nacelle, and the other part of the devices is disposed in the nacelle.

The doubly-fed wind power generation equipment 2 in this embodiment has all the beneficial effects of the doubly-fed wind power generation system 1 in any of the above embodiments, and details are not described herein again.

The basic principles of the present invention have been described above with reference to specific embodiments, but it should be noted that advantages, effects, etc. mentioned in the present invention are only examples and not limitations, and these advantages, effects, etc. should not be considered as necessarily possessed by various embodiments of the present invention. Furthermore, the specific details disclosed above are for the purpose of illustration and understanding only and are not intended to be limiting, since the invention is not to be limited to the specific details described above.

The block diagrams of devices, apparatuses, devices, and systems according to the present invention are only given as illustrative examples and are not intended to require or imply that the connections, arrangements, and configurations have to be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to". It should also be noted that in the apparatus and device of the present invention, the components may be disassembled and/or reassembled. These decompositions and/or recombinations are to be regarded as equivalents of the present invention.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A doubly-fed wind power generation system, comprising:

a main generator assembly (11);

the wind wheel driving assembly (12), the wind wheel driving assembly (12) is in transmission connection with the main generator assembly (11);

the auxiliary generator (13), the auxiliary generator (13) is in transmission connection with the wind wheel driving assembly (12) through an auxiliary transmission mechanism (14);

a control device (15) electrically connected to the main generator assembly (11) and the auxiliary generator (13).

2. The doubly-fed wind power generation system of claim 1,

the wind wheel driving assembly (12) comprises a wind wheel mechanism (121) and a main transmission mechanism (122), the input end of the main transmission mechanism (122) is in transmission connection with the wind wheel mechanism (121), and the output end of the main transmission mechanism (122) is in transmission connection with the main generator assembly (11);

the input end of the auxiliary transmission mechanism (14) is in transmission connection with the main transmission mechanism (122), and the output end of the auxiliary transmission mechanism (14) is in transmission connection with the auxiliary generator (13).

3. The doubly-fed wind power generation system of claim 2,

the main transmission mechanism (122) includes:

a transmission (1221);

one end of the first transmission shaft (1222) is in transmission connection with the wind wheel mechanism (121), and the other end of the first transmission shaft is in transmission connection with the input end of the speed changer (1221);

a second transmission shaft (1223), one end of which is in transmission connection with the output end of the transmission (1221), and the other end of which is in transmission connection with the main generator assembly (11);

wherein the auxiliary transmission mechanism (14) is in transmission connection with the first transmission shaft (1222) or the second transmission shaft (1223).

4. A doubly-fed wind power generation system according to claim 3, characterized in that said auxiliary transmission (14) comprises:

the belt wheel mechanism (141), the belt wheel mechanism (141) includes a first belt wheel (1411), a second belt wheel (1412) and a transmission belt (1413) which are in transmission connection, the first belt wheel (1411) is sleeved on the first transmission shaft (1222) or the second transmission shaft (1223), the second belt wheel (1412) is sleeved on an input shaft of the auxiliary generator (13), and the transmission belt (1413) is wound on the first belt wheel (1411) and the second belt wheel (1412) and is in friction transmission with the first belt wheel (1411) and the second belt wheel (1412).

5. A doubly-fed wind power generation system according to claim 3, characterized in that said auxiliary transmission (14) comprises:

the chain wheel mechanism (142) comprises a first chain wheel (1421), a second chain wheel (1422) and a transmission chain (1423), wherein the first chain wheel (1421) is in transmission connection with the first transmission shaft (1222) or the second transmission shaft (1223) in a sleeved mode, the second chain wheel (1422) is in sleeved connection with an input shaft of the auxiliary generator (13), and the transmission chain (1423) is wound on the first chain wheel (1421) and the second chain wheel (1422) and meshed with the first chain wheel (1421) and the second chain wheel (1422).

6. A doubly-fed wind power generation system according to claim 3, characterized in that said auxiliary transmission (14) comprises:

a gear mechanism (143), the gear mechanism (143) comprising a plurality of sequentially meshing transmission gears, the plurality of transmission gears comprising an input gear (1431) and an output gear (1432);

wherein the input gear (1431) is sleeved on the first transmission shaft (1222) or the second transmission shaft (1223), and the output gear (1432) is sleeved on an input shaft of the auxiliary generator (13).

7. A doubly-fed wind power generation system according to any of claims 2 to 6, further comprising:

and the clutch device (145) is arranged at the joint of the main transmission mechanism (122) and the auxiliary transmission mechanism (14), and the auxiliary transmission mechanism (14) can be connected or disconnected with the main transmission mechanism (122) through the clutch device (145).

8. A doubly-fed wind power generation system according to any of claims 1 to 6, further comprising:

an auxiliary power system (16), wherein the auxiliary power system (16) is electrically connected with the control device (15), and the auxiliary power generator (13) supplies power to the auxiliary power system (16) through the control device (15);

wherein the auxiliary power system (16) comprises a pitch system (161), a yaw system (162), and a heating system (163).

9. The doubly-fed wind power generation system of any of claims 1 to 6,

the auxiliary generator (13) is a permanent magnet generator; and/or

The main generator assembly (11) comprises:

the main generator (111), the main generator (111) is a doubly-fed generator, and the input end of the main generator (111) is in transmission connection with the wind wheel driving component (12);

a transformer (112) electrically connected to the main generator (111) and the control device (15);

and a converter (113) arranged in parallel with the transformer (112).

10. A doubly-fed wind power plant, characterized in that it comprises:

the doubly fed wind power generation system of any of claims 1 to 9.